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Builder's Lab / Week 03 / Wednesday
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Week 03 · Ball on Top

Wednesday

Build version 1
// A tower that holds a ball up high
⏱ about 20 min

Wednesday: Build Version 1

Rocket tapes straws into a tall box shape, fast.

Four legs and a square on top. "Done!" Rocket says.

Raven holds the ruler next to it. "It is seven inches tall."

Nova hovers close. "Let us set the ball on top and count."

You need

  • 12 straws
  • Tape
  • A tennis ball (any small ball works)
  • A ruler
  • A timer
Safety first
A grown-up cuts straws if they need to be shorter.
Do not throw the ball indoors.
Keep straw ends away from eyes.

Build it

  1. Pick one drawing from Monday.
  2. Build your frame with straws and tape.
  3. Set the ball on top gently.
  4. Count to ten.
  5. Measure from the table to the bottom of the ball.
VersionBall height (inches)Held 10 seconds?
Version 1
MEASURE IT RIGHT
  • Read the question.
  • Tap your answer.
Where do you start measuring?
WHICH STEP?
  • Read the question.
  • Tap your answer.
You set the ball on top and count to ten. Which step is that?

Where does the ball go?

The ball needs a flat spot on top.

A small square of straws can hold it like a nest.

Measure to the bottom of the ball, not the top.

BUILD CHECK
  • Read the question.
  • Tap your answer.
Where do you measure the ball height to?
How many straws may you use?
Rocket's box tower is 7 inches tall. Is it tall enough?
IdeaTrue or false?
You may throw the ball onto the tower.?
Set the ball on top gently.?
A grown-up cuts straws if needed.?
The tower may lean on a wall.?
WHY THIS EXERCISEGentle, fair tests give results you can trust.
TEST VERSION 1
  • Tap a card.
  • Then tap its spot.
1First
2Next
3Then
4Last
Draw your version 1 tower with the ball on top.

Version 1 is built. Nice work!

Tomorrow, we look at what happened.

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